Dark/yellow tips. Light burn?

Hey,

I'm at day 60. the temperature here is higher than the plants are used to (currently 28 degrees). Could this be the cause of these symptoms shown in the pictures? First time grower, no clue. I've tried researching and looking up the symptoms/causes but very difficult for me to say.

I am guessing light stress, heat stress or overfeeding (?)

also.. the bottom leaves are supposed to yellow, right?

dont worry about the leaves anymore once you have reached this stage of flowering.